Fluid-pressure brake.



W. V. TURNER.

FLUID PRESSURE BRAKE.

APPLICATION FILED JUNE 28. 1915.

1, 179,479. Patented Apr. 18, 1916.

WITNESSES ,INVENTOR I fimazfm I citizen of the brakes, comprising "cylinder and thus releese or the oralrss.

. pressure vmnrnn v. senses, snemvoon, PENNSYLVANIA, essze'non TO THE wns'rmesome see erases conserve, or WILMERDING, rqnnnsvm nmn, s CORPQBATION on rsm svnvenm.

To all whom it may concern: Be known that l, i l ALT R 'V. TURNER, a United States, residing st Edgev'ood, in the county of Allegheny and tote of Pennsylvania, have invented new, end useful improvements in Fluid-Pressure Brakes, of which cation.

This invention relates to fluid pressure brakes, and more particularly to a brake equipment employing a supplemental reservoir for obtaining graduated release.

It has heretofore been proposed to pro vide means for graduating the release oi" the s supplemental reservoir adapted to be normally charged from the brake pipe and arranged to supply fluid under-pressure to the valve chamber side of the triple valve piston upon'movelnent to release positienunder sn increase in brake pipe pressure. The increase in pressure thus produced eiiects the movement of the triple valve piston graduating valve so as to cut oil the release of fluid from the brake permit of graduating the the following is a specifi- This supplemental reservoir also serves as s meensfor quickly recharging the suKiliaryreservoir, since upon movement to release position, if the auxiliary reservoir supplemental reservoir Will flow to the auxiliary reservoir in addition. to the usual flow. from the brake pipe through the feed groove around the triple valve piston.

it is sometimes desired to out out the graduated release feature for example,

where only a. part of the cars in e train are equipped with u brake apparatus having means for Tredusting the release of the brakes, but with the apparatus heretofore propose-d, when the graduated release fee ture is out out the quick recharge feature is also lost.

n I y The quick recharge restore prevents "e cesgve drainage from the brake pipe in releasing the brakes, by partly effecting the recharge of the auxiliary reservoir from the supplemental reservoir, so that a quick rise Specification of Letters Patent. i mense filed une es, 3915. serial no. 36,630.

' retain the.

View similar oeeu reduced, fluid from the.

The main slide I sition' of the valve and the gre'dueting valve.9

v resin-reissues mums.

Patented Apr. 18, 1916.

in brake pipe pressure is feciliteted,nnd therefore it would be highly desirable to graduated release is cut out.

The principal object of my invention accomplishing the Figure 1 is a central sectional view of a. triple valve devioe, vv1th my improvement applied thereto; Fig. 2 a detail sectional view, showing the positionof the graduated release cap for cutting out both the the quick recharge features; to Fig. 2, showin of the graduated release cap both the greduated release and charge features.

s shown in Fig. 1 of the drawing, a triple valve device may be provided, comprising a casingl, having a piston chamber 2 connected to brake pipe 3 and containing piston i, and having a valve chamber 5 connected by pipe 6 to auxiliary reservoir 7 and containinga main slide valve 8 and a gradusting valve 9 adapted to be operated by piston 4i. l Pipe 10 leads to the brake cylinder and, is connected to passage 11, leading to the seat the position or cutting in quick recharge feature "when."

graduated release and and Fig. 3 eV the quick reof slide valve 8 and a supplemental resersage 17 leading to the cap 15 and is adapted- 1n one position cavity 18 with the passage 14.

volve is provided with the usual service port 19 adopted in service poto register with passage 11 for supplyingiiuidtrom the auxiliary reservoir to the brake cylinder.

For controlling the release of the brakes, the main slide valve 8 is, provided with a cavity 20 adapted in the release position of the-valve to connect brake cylinder passage 11 with a passage. 21 leading to, the ca is. also provided I of the cap to be connected by with a cavity the sition of the graduat. valve connect cavity with a port in the ma valve 8 which registers with a passage i l is .ling to an atmospheric exhaust. passage In operation, if the gra du d release tea ture is JO be cut out a" e the quick recharge feature cut in, the raduated cap is ad j'ustecl to the position shown in Fig. l, in which cavity 18 connects passages 1.4 and l? and a cavity 26 connects passages 21 illlien the brake pipe is char :d with fluid under pressure, air flows through the usual feed groove adap release pci, around the triple valve piston sand charges valve chamber 5 and the auxiliary reservoir '3'. l e supplemental reservoir 12 is also charged from valve chamber 5 through port 16., passage 17. cavity 18, passage v v releasing. the brakes after an appl1calion, the triple valve parts wil be moved to release position, and fluid the noranally charged supplemental reservoir will.

be admitted through port 16 to valve chamber 5 and the auxiliary reservoir so as to assist in quickly recharging same.

In the position the graduating cap shown in Fig. 1, passage 21 is connected by cavity 26 to exhaust passage 25, so that fluid can exhaust iron) the brake cylinder through cavity '29 in the main valve 8, as Well as through usual exhaust cavity 29 in the graduatir valve Shouml he triple valve plston 4 be moved out to graduated release position by the venting of fluid from the su n lemental rescrvoir to valve chamber 5, While the grad-' uatiug valve will thus be shifted to close hralze.,xvlinder exhaust through cavity fiuiu re the brake cylinder can still continue to aiaust through the cavity 20 in the main slide valve 8, so that the release of the brakes will not be graduated. lt Will therefore bsscen that with the graduated r lease cap 15 in the position shown in 1, the graduated release is cut out While quick recharge feature is retained.

If both duatecl rel ase and quick recharge is do ed. the cap 15 is turned to the position shown in Fig. 3, in which cavity 28 connects l4 17 while passages 21 and 25 are blanked.

'21 and 25 in this position, if it is desired to have the brake cylinder exhaust through the main valve.

Having now described my invention. what I claim as new and desire to secure by Letters Patent, is:

1. In a fluid pressure brakei'the combiu tion with a valve device for controlling release of the brakes, of a. supplement reservoir from which fluid is adapted to supplied to the chamber at one side of saf' valve device to eilect a graduated rclea of the brakes and the quick recharge of sa chamber and means for cutting out the graduated release feature While retaining the quick recharge feature.

2. In a fluid pressure brake, the combina tion Wit-ha brake pipe and a valve device having a piston subject to the opposing pressures of the brake pipe and a chamber for controlling the release of the brakes of a supplemental reservoir from which fluid is supplied to said chamber in the release position of said valve device to eilect graduated release of the brakes and the 1 ck recharge of the chamber and means cutting out the graduated release ieature While retaining the quick recharge feature.

3. The combination with a brake pipe and a valve device subject to the opposing pressures oi the brake pipe and a chamber for controlling the release of the brakes, a supplemental reservoir from which fluid is adapted to be supplied to said chamber in the release position of said valve device to efi'ect the movement of the valvedevice 1w thereby cut out graduated release While permitting the recharge of said chamber from the supplemental reservoir.

l. The combination with a. brake pipe and a valve device subject to the opposing pressures of the brake pipe and a chamber for controlling the release of the brakes and having means for graduating the lease of the brakes and quickly recharging said chamber, of manually operable means having one position in which graduated release and quick recharge are out in and another position in which graduated release is out out and quick recharge is cut 5. The combination with a brake pipe on a valve device subject to the opposing sures of the brake pipe and a chamber icr l ll position in which graduated release and quick recharge are cut out. In'testimony whereof I have hereunto set my hand. i WALTER V. TURNER.

Witnesses: t

A. M. CLEMENTS, JOHN H. EIGHER.. 

